High-temperature lithiation of α-Fe2O3: A mechanistic study
High-temperature lithiation of α-Fe2O3: A mechanistic study
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α-Fe2O3 的高温锂化：机理研究
DOI：
10.1016/0022-4596(84)90278-0
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发表时间：
1984
影响因子：
3.3
通讯作者：
J. Goodenough
中科院分区：
文献类型：
--
作者：
M. Thackeray;W. David;J. Goodenough
在420° C下，在Li-Al LiCl，KCl α-Fe 2 O3型电化学电池中研究了α-Fe 2 O3的锂化反应机理.最初的六方密堆积的氧化物晶格转变为立方密堆积堆叠。电化学和结构数据表明，放电反应是通过锂嵌入密排立方晶格，铁从密排立方晶格中挤出，最终生成Li 2 O和α-Fe.先前的报道已经表明，该过程是可逆的，并且可以从这种类型的电池获得高库仑效率，只要电极未放电至其完全组成极限。
The reaction mechanism for the lithiation of α-Fe 2 O 3 has been studied at 420° C in electrochemical cells of the type Li Al LiCl, KCl α-Fe 2 O 3. Initially the hexagonally close-packed oxide lattice transforms to cubic close-packed stacking. Electrochemical and structural data indicate that the discharge reaction proceeds via insertion of lithium into, and iron extrusion from, the cubic close-packed lattice to yield the final discharge products Li 2 O and α-Fe. Previous reports have shown that this process is reversible and that high coulombic efficiencies can be obtained from this type of cell, provided that the electrode is not discharged to its full compositional limits.